IB/hfi1: Define 16B Management Packets

Add 16B Management Packet definition. This optimized packet
format replaces the ib_other_headers and BTH with a source
and destination QP number.

To support these packets we introduce struct opa_16b_mgmt
into the struct hfi1_16b_header.

This packet format is only used for MAD packets using the
IB_OPCODE_UD_SEND_ONLY opcode on QP0/1.

The original 16B implementation failed to use 16B management
packets so now we add their definition.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Don Hiatt <don.hiatt@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/hfi1/hfi.h

@@ -392,6 +392,7 @@ struct hfi1_packet {
  */
 #define OPA_16B_L4_9B		0x00
 #define OPA_16B_L2_TYPE		0x02
+#define OPA_16B_L4_FM		0x08
 #define OPA_16B_L4_IB_LOCAL	0x09
 #define OPA_16B_L4_IB_GLOBAL	0x0A
 #define OPA_16B_L4_ETHR		OPA_VNIC_L4_ETHR